Force Systems
| Type | Description | Image |
| Static Equilibrium | the state when the net effect of all the forces acting on an object equal zero |  |
| Free Body Diagram | a simplified and conceptual diagram that isolates a structural member under investigation from the rest of the structure |  |
| Concurrent Forces | forces that pass through the same point or intersect at a common point | |
| Non-Concurrent Forces | forces that do not pass the same point or do not intersect. Parallel forces are an example of non-concurrent forces |  |
| Collinear Forces | forces that act along the same line of action |  |
| Non-Collinear Forces | two or more forces that act along different lines of action. | |
| Coplanar Forces | forces that act along the same plane |  |
| Non-Coplanar Forces | forces that do not lie in the same plane and have a have a three dimensional arrangement |  |
